Insulator.



A. F. EFFFHG.

INSULATOR. APPLICATION man HAY41'915.

Patented July 2%, 1917.

ANTHONY F. EFFRIG, OF PEBKASIE, PENNSYLVANIA.

INSULATOR.

Specification of Letters Patent.

Patented July 24, 1917.

Application filed May 4, 1915. Serial No. 25,800.

To all whom it may concern:

Be it known that I, ANTHONY F. Errsro, a citizen of the United States, residing at Perkasie, in the county of Bucks and State of Pennsylvania, have invented certain new and useful Improvements in Insulators, of

which the following is a specification.

This invention relates to insulators and more especially to that type which are adapted for association with cross-arms of teleh 1 ics. The principal object of this invention is to provide an insulator which is adapted for git vthe reception of a plurality of telegraph or I telephone wires, in order to hold the same from casual displacement, without the use of binding wires, plates, etc.

Another object of the invention is to providea detachable insulator, which may be readily removed .when rendered unsuitable for use, and'is capable of expeditious attachment to the ordinary type of cross-arms used atthe present time, the insulator being of such a configuration as to occupy a minisulator constructed mum amount of space, at the same time, permitting the wires to be readily engaged therewith, and disengaged therefrom.

Other objects as well as the nature, characteristic features and scope of my invention will be more readily understood from the following description taken in connection with the accompanying drawings and pointed out 'in the claim forming a part of this specification.

Referring to the drawings:

Figure 1 is a perspective view of the inin accordance with my invention,

Fig. .2 is a side elevational view of the same, Fig. 3 is a similar vi w looking at another side, a portion thereof being broken away to disclose details, and d Fig. 4 is a sectional view taken on the line H of Fig. 2, and looking in the direction of the arrows.

In the drawings wherein is illustrated the preferred embodiment. of this invention, an insulator 1 is provided, preferably made of porcelain or glass, although any other suitable insulating material may be used. The insulator body is of a substantially rectangular configuration, and tapers slightly toward its upper end, the free terminal of the latter issuing in a pyramidion 2. By this peculiar formation it will be appreciated that snow, etc, will be positively precluded from adhering to the insulator, the pyramidion likewise providing a shed for water or the like, so as to prevent contact of the same with the electric wires. 7

Two of the opposite walls of the insulator l, subjacent the pyramidion 2 are provided with converging recesses 3, each of the latter extending from one of the walls of the insulator and converging so as to engage a complemental recess, which extends from an opposite wall, so as to provide substantially V-shaped ways, as illustrated to advantage in Fig. 2.

A V-shaped projection or coping 4.- depends from each side of the pyramidion 2, exterior of the way or recess 3, and appreciably spaced from the insulator body, which projection tapers slightly outwardly so as to shed water or the like beyond the insulator body, precluding its contact with the' minal of the pro'ection, 4:; each of the lower terminals of sai projection being grooved,

directly abovethe apex of the ways 3, so as. to dispose the wire 6 in a substantially horizontal plane, the wire being only suiiiciently flexed at its point of engagement with the projection 4:, to prevent the wirefrom being casually displaced. It will be understood upon reference to Fig. 2, that the wires also engage in the way 3, at that point where each of said ways opens through the opposite walls of the body of the insulator, from that in which the ways are formed.

The insulator is preferably tubular as indicated at 7 and shown to advantage in Fig. 3, the lower end of the bore being preferably enlarged-and screw-threaded, as at 8, for screw-threaded engagement with the stud on the cross-arm of a telegraph p le. By enlarging the lower end of the bore, in which the screw-threads 8 are will be seen that the insulator may be advanced on the stud only a limited distance, thereby rendering it impossible to snugly engage the insulator with the stud, which as is well known is undesirable, in view of formed, it

In operation, the electric wire 6 1s first flexed so as to conform to the shape of the V-shaped way 3, and pressed intothe lat 'ter, after which the exertion of pressure on the wire will cause the same to straighten out and assume the position as shown in Fig. 2, in which instance, the wire will engage the inner terminal of the projection 4 and the vertices of the way 3 as previously pointed out. The nose 5 on each ofthe lugs 4: will positively prevent the wirefrom being casually displaced, although the wire may be readily removed when so desired.

It will be understood that the above de scription and accompanying drawings comprehend only the general and preferred'embodiment of my invention and that various minor changes in details of construction, proportion and arrangement of parts may be made within the scope of the appended claim without sacrificing any of the advan tages of my invention,

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

An insulator comprising a frusto-pyrami- .dal base having a pyramidal top formed on copies or? this patent may be obtained for the upper face of the said 4 dal base for providing an abrupt edge at the perimeter of the top surface of the said frusto-pyrarnidal lows, the top portion of the said base having. grooves formed on opposite sides, each groove extending inwardly and downwardly at an angle from the side of the said base and joining at the center of the base for providing a substantially V- shaped groove at each side of the said base-- the angular portion of each ove also extending outwardly toward t e side of the base whereby the vertex of each Vshaped groove is disposed nearer the side of the base than, are the terminals of each groove,

ANTHONY narrate.

Witnesses IRVIN ,Y. BARINGER, WILSON L. YnAKnn.

five cents each, by addressing the flemmiseiener of Eaten-to, Washington, I 0. 

